Transmission-gearing.



E. SfROBINS ONL TRANSMISSION GEARING.

APPLICATION FILED JUNE 3, 191a.

. Patented Apr. 7, 1914.

2 SHEETS-SHEET 1.

E. s. ROBINSON. TRANSMISSION GBARING. APPLICATION FILED IUNE 3,1913.-

1 ,U,4. Patented Apr. 7, 191% 2 SHEETS-SHEET 2.

E. (S. fiabmso 11.

Tlidl.NSILIIESSION-GEARII\TG.

To all whom it may concern. Be it known that l, EDWARD S. lton lvson, a citizen of-the United States, residing at Uroville, in the county of Butte and Stete of California, have invented new endnseful improve-me in f l nsmiss Jriilfig, of which the rmlowlng is e. specincetion. a

This invention relates to transmission gearing and while the inven n particularly d lc-(l for use in connection. "Villlfl the driving mechanism of automobiles, motor trucks and other mecheniculiy propelled vehicles, it will be seen us the de seription proceeds that the trsnsimssion gearing may be util zed 111 e. nun ber of places and iQlHiJIODS which Will readily sugthemsclves.

The broad object of the invention is to provide a transmission gee-ring by means of which the relative speeds of rotation of a driving shaft and a driven shaft may be varied or changed in eccordunoe with the required conditions.

A'further object of the invention 15 to provide a variable speed-transmissiongoering of the friction type m. which a friction wheel is driven 'by a friction disk, the fr1c tion wheel embodying a differential working face thereby admitting of the necessary Width or de ree of d iving contact between the friction l and the friction wheel.

is. further object of the invention is to prov de a novel construction of friction wheel of sectional form, the said wheel embodying 2. number of wheel-like sections cooperatively related so that the several sectionsere zed-opted to operate at different speeds in accordance with the path traveled by each section on the Working face of the friction disk.

Another object of-the invention is to provide an abutment wheel which backs up the friction disk in opposition to the friction Wheel, to insure Working and driving contact between the friction disk and Wheel.

\Vith the above and other objects review, the invention consists in the novel construction, combination and arrangement of ports, as will 11 'cinufter be more fully dmcribed, illustrated claimed.

In the accompanying drawings: Figure is a sectional view of the transmission gearing of this invention. Fig. 2 is a plan view of the some looking toward the under side Specification of Letters Eatent.

Application. filed June 3, 1913.

Patented Apr. "1. MM 4. Serial no. 371,489.

of Fig. 1, the friction wheel being shown partly in section. Fig. 3 is a cross section on-t-he line 3-3 of Fig. 1. Fig. f is an end elevation illustrating the eccentric mounting of the driven shaft and operating means for shifting said driven shaft.

The frame of the transmission gearing is designated. generally by the reference churecter A, said frame being shown as supported by an arm 1, which, in automobile practice may extend to and connect with either the engine frame or the frame or chessis of the vehicle. The frame A is shown as comprising two armsQ and 3' in which are mounted two oppositely arranged bearings 4. The driven shaft 5 is journaled in the bearings 1 the journal openings being eccentric of the peripheries of said bearings s so that when said bearings are turned the shaft will be shifted toward and away from the friction disk hereinafter described, to effect on ei'lgugement or disengagement between the friction disk and friction wheel, the latter being carried by the shaft 5. Each of the beerings f is an operating arm 6 which may be connected to any suitable manually controlled device for simultaneously turning both of the beerings 1- for the purpose stated.

The driving shaft indicated at 7 extends in :1 plane parallel to the driven she ft 5, the shaft 7 forming either the engine shaft or an extension of the engine shaft, 8 designating the flywheel of the engine. The shaft 7 is also journaled in the frame A at the point 9 and the extremity of said shaft is. also journoled at the point 10 in a tubular bearing 11 forming an extension of the frame It as shown in Fig. 1.

Journeled in the tubular extension 11 is a countershsft 12 which is at right angles to the shafts '4" and 5. On one end of the shaft a friction disk 1% having a miter gear face 14 which meshes with and is driven by a miter gear 15 fast on the shaft 7. The working face of the disk 13' is perfectly flat While the opposite or rear face thereof is beveled or conical as shown at 17 and in connection with the beveled face 17, I enr' shown as provided with by the letter B and which works in driving contact with the opposite face 16 of said friction disk as shown in Fig. 1.

The frictional wheel B is of sectional construction and has a differential working face. In other words the friction wheel B is composed of a plurality of wheel-like sections 19, 20 and 21, the combined peripheries of said sections forming the working friction face of the wheel. All of the sections are mounted on the shaft 5. and therefore have a common axis of movement and the peripheries of all the said sections bear with equal pressure against the working face of the friction disk 16.

It Will be observed that the middle section 20 of the friction wheel is cored outor recessed to permit one or more pinions 22 to be journaled therein on an axis radial to the shaft 5. The other sections 19 and 21 are provided on their inner adjacent sides with rack faces 23,- the .pinion or pinions 22 meshing with the rack faces 23 so that when one of the sections 19, 20 and- 21 is moved at a different speed from one of the other sections, a differential and roportionately higher or lower speed will he imparted to each of the remaining sections.

Referring now to.-Fig. 2 wherein the work-. ing face 16 of the friction disk 13 has been divided up byimaginary concentric lines 24: into a plurality of Working faces each of the same width as the periphery of one of the sections 19, 20 and 21 of the friction wheel, it will be readily understood that the outer section 19 of the wheel B will be driven at a greater rate of speed than the inner section 21. In other words the nearer the section of the wheel B to the center of the wheel 13, the slower the rate of speed at which said section is driven. Therefore a friction wheel having a single working face would cause a decided drag and wear between the contact faces of the disk and wheel which would absorb considerable power. By dividing up the face of the friction wheel and providing for the differential movement of the faces of the sections, such drag is overcome while at .the same time retaining the full advantage derived from a wide working face or broad contact between the friction disk and the friction wheel. As stated the abutment wheel 18 backs up the disk 13 and insures driving contact between the wheels 13 and B.

25 designates an end thrust bearing for the counter-shaft 12, which insures the reduction of the friction of the shaft 12 to a minimum.

' Any means such as a lever may be em- 'ployed for shifting the friction wheel B longitudinally of the shaft 5 and across the face of the friction disk 13 for the purpose Copies of. this patent a be obtained for of varying the relative speeds of rotation of the driving shaft 7 and the driven shaft 5. Before shifting the wheel B across the face of the ,wheel 13, the bearings 4, are turned so as to relieve the driving contact between the wheels 13 and B. After the wheel B has been shifted. to the desired extent across the working face of the friction disk, the wheel B may then be shifted back into driving contact with the wheel 13 by means of they eccentric bearings 4. as hereinabove explained.

Whatis claimed is:

a 1. Transmission gearing comprising a frame, a driving shaft, adriven shaft, a countershaft at a right angle to said driving and driven shafts, a friction wheel onthe driven shaft, a friction driving disk on said countershaft having a flat side which works in contact with said friction wheel and a beveled side embodying a beveled gear face and a beveled abutment face surrounding said beveled ear face, a beveled pinion fast on said driving shaft and meshing with the beveled gear face of said friction driven disk, a rotary abutment loose on said driving shaft and working against the beveled abutment face of said friction driving disk, means oh said driving shaft to prevent said rotary abutment from moving longitudinally of the last named shaft, and means for shifting said friction wheel across the flat side of the friction driving disk.

Q. 'lransmission gearing comprisin a frame, a driving shaft, a driven'sha t, ,a countershaft at a right angle to said driving and driven shafts, a friction wheel on the driven shaft, a friction driving disk on said countershaft having a fiat side which works in contact with said friction wheel and a beveled side embodying a beveled gear face and a beveled abutment face surrounding said beveled gear face, a beveled pinion'fast on sa 1d driving shaft and meshing with the beveled gear face of said friction driven disk, a rotary abutment on said driving shaft working against the beveled abutment face of said friction driving disk, means for shifting said friction wheel 'across'the fiat side of the friction driving disk, an end thrust bearing for said counter'shaft, and a bearing sleeve for said countershaft formed by an extension of said frame, said sleeve having one end of the driving shaft supported thereby. Y

In testimony-whereof I afiix my signature in presence of twowitnesses.

EDWARD S. ROBINSON.

Witnesses:

K. M. RonnvsoN, R. H. DUNN.

five cents each, by addressing the "Commissioner. of ratents, Washington, D. G. 

